Abstract: The scroll-type compressor comprises a fixed scroll 320 and an orbiting scroll which are engaged with each other, a front housing 220 for accommodating the fixed scroll 320 and the orbiting scroll, and a rear housing 240 joined to the open end of the front housing 220. The fixed scroll 320 has the base plate 322 fitted into the front housing 220, and the flange 326 held at a joint surface between the front housing 220 and the rear housing 240. Additionally, at least one of the flange 326 of the fixed scroll 320 and the front housing 220 forms therein a recessed portion 326A or 220E which permits the fixed scroll 320 to be displaced in an axial direction toward the orbiting scroll due to a pressure difference acting on opposite surfaces of the base plate 322 of the fixed scroll 320.

Abstract: To provide a housing seal structure in which the sealability between housings using an O-ring is improved. The housing seal structure seals joining portions 57 and 59 of a fixed scroll 24 and a front housing 4, respectively, which are joined to each other, by an O-ring 62 and is provided with a stepped coated portion 64 formed in the joining portion of the front housing on the outside relative to an O-ring groove 63 accommodating the O-ring, having a predetermined width, and extending to the outer peripheral contour of the front housing, a liquid sealing agent 68 charged into the coated portion to be applied thereto, and a contact portion 67 which is formed between the O-ring groove and the coated portion and which the joining portions of the fixed scroll and the front housing contact.

Abstract: A structure for smoothly attaching an engine accessory configured to be driven with a belt to an engine body at an appropriate position. A compressor 100 configured to be driven with a belt 3 is fastened by screwing three bolts 8 respectively inserted in a first bolt insertion hole 5 having a complete circular sectional shape with a minimum fitting gap, a second bolt insertion hole 6 having an oval sectional shape in a hole portion near an accessory attachment part 9 and having a complete circular sectional shape with a diameter greater than or equal to a longer diameter of the oval sectional shape in a hole portion reaching a head portion of a corresponding one of the bolts, and a third bolt insertion hole 7 having a complete circular sectional shape with a sufficiently large diameter, into corresponding screw holes 10 in the accessory attachment part 9.

Abstract: A housing forms one portion of a compressor case and supports a bearing for a main shaft has an opening through which gas Is sucked; a suction space extending from the opening to inside of the compressor; a first gas passageway extending from the suction space in the direction of the axis of the main shaft; a second gas passageway connecting the first gas passageway and the space in which the main shaft bearing is disposed. A shell forms the other portion of the compressor case and is fastened to the housing has a third gas passageway connecting the first gas passageway and the internal space of a compression mechanism. The first gas passageway and the third gas passageway are connected to each other further on the outer side of the main shaft in the rotation radius direction than the movable region of the bottom plate of a movable scroll.

Abstract: A scroll-type fluid machine (1, 88) in which a fixed scroll (8) and a movable scroll (10), in consort, demarcate a compression or expansion chamber (60) of a lubricant-containing working fluid, the fluid machine having a housing (4) provided with a port (16) through which the working fluid passes, and a pedestal section (62) in which the port opens, and which is applied with thrust load on the back face (64) side of an end plate (10a) of the movable scroll due to the demarcation of the compression or expansion chamber. The pedestal section has a groove (72, 90) formed in a region including an opening of the port.

Abstract: Provided is a scroll fluidic device that is capable of reducing suction pressure loss as well as suppressing discharge pulsations and reducing noise. The scroll fluidic device is characterized in that a fixed scroll member is integrally formed with a center housing on the inside of the center housing disposed between a front housing and a rear housing; the end surface of the outer shell of the center housing is positioned lower than the height of a scroll lap of the fixed scroll member, with an end plate of the fixed scroll member served as a reference of position in the height direction; and a corridor-like space extending in the device circumferential direction, which is surrounded by an outer shell forming portion of the center housing, the inner surface of an outer shell of the front housing, the scroll lap of the fixed scroll member, and the end plate of a movable scroll member, is formed.

Abstract: Disclosed is a scroll fluid machine configured from inexpensive materials and provided with a rotation prevention mechanism with excellent durability. In the scroll fluid machine, a fixed scroll, the spiral body of which has been vertically disposed on one end surface of an endplate, and a movable scroll, the spiral body of which has been vertically disposed on one end surface of the endplate, are arranged eccentrically to and out of phase with each other such that the spiral bodies engage with each other and the movable scroll turns relative to the fixed scroll. The scroll fluid machine is characterized by being provided with a rotation prevention mechanism comprising a movable-side pin that protrudes from the other surface of the endplate of the movable scroll, a fixed-side pin that protrudes from the housing side towards the other surface of the endplate of the movable scroll, and a rotation prevention member held from both sides by the movable-side pin and the fixed-side pin.

Abstract: A scroll type fluid machine having a rotation-preventing member extending between at least one of a fixed scroll and a housing which form a non-orbiting part and a movable scroll and preventing rotation of the movable scroll, and also having a mechanism for making the rotation-preventing member movable, the mechanism being provided to the rotation-preventing member for permitting a movement of the rotation-preventing member itself which movement is required for the rotation-preventing member to permit an orbital movement of the movable scroll. The scroll type fluid machine, with the rotation-preventing mechanism for the movable scroll, can be easily assembled into a target assembly condition, and can be formed to be small-sized and light-weighted.

Abstract: A shaft sealing device (80) that partitions a high-pressure zone and a low-pressure zone from each other in a fluid machine has an elastic member (86) including a seal portion (88) that is brought into sliding contact with a seat face of a contact-target member that is either a rotary shaft (60) or a casing (12), and a case (82) that supports the elastic member (86). The elastic member (86) has a first elastic portion that continues to a high-pressure side boundary of the seal portion (88), which is located in the high-pressure zone side, and a second elastic portion that continues to a low-pressure side boundary of the seal portion (88), which is located in the low-pressure zone side. The case (82) restrains regions of the first and second elastic portions, the regions being located away from the seal portion (88).

Abstract: A shaft seal that is in sliding contact with the outer surface of the shaft of an open type compressor or a fluid device driven by an external power source and seals the inside of the compressor or of the fluid device against the outside. At least a sliding section of the shaft seal, which sliding section is in sliding contact with the outer surface of the shaft, is made from a material into which a substance having a melting point in the range of 150-300° C. is added and uniformly dispersed. The shaft seal can improve its thermal resistance and abrasion resistance, can exhibit excellent durability, and is particularly suitable for compressors using a carbon dioxide refrigerant which are driven under high-temperature, high-pressure conditions.

Abstract: A compressor of the present invention having an electromagnetic clutch (14) for transmitting a driving force from a driving source (15) to a rotary shaft (4), in which the clutch (14) includes a rotor (16) rotated by receiving the driving force of the driving source (15), the rotor (16) containing an electromagnetic solenoid (22), a hub (48) fixed to the rotary shaft (4), and a clutch mechanism (24) capable of connecting the rotor (16) and the hub (48) to each other; the clutch mechanism (24) has an armature (26) attracted to the rotor (16) when the solenoid (22) is in an operating state, an inner support (31) coupled to the hub (48), and a shim (62) sandwiched between the inner support (31) and the hub (48); and the shim (62) determines the size of a gap (L) to be secured between the rotor (16) and the armature (26) when the solenoid (22) is in a resting state.

Abstract: A compressor includes a housing for accommodating a compression mechanism, and an oil separator including a cylindrical body having inner and outer cylinders defining therebetween an annular oil separating chamber and fixed in a communication passage of the housing. The outer cylinder is spaced from a communication passage-forming portion of the housing to define a gap therebetween, extends along a slit formed in the communication passage-forming portion of the housing, and is formed with an opening directed tangential to the oil separating chamber and facing part of the slit. Gas discharged from the compression mechanism flows through the slit and the opening into the oil separating chamber to form a swirl flow, so that lubricating oil is centrifugally separated from the gas. Part of the gas collies with an outer face of the outer cylinder, whereby lubricating oil is separated from the gas.

Abstract: A swash plate compressor comprises a swash plate rotated by a drive shaft and a piston that reciprocates in a cylinder bore by the rotation of the swash plate. The piston includes a tail and a pair of shoes retained in the tail. The shoes sandwich an outer periphery of the swash plate. Each shoe has a receiving face for receiving the outer periphery of the swash plate. A central point of the receiving face is located off a common plane including an axis of the piston and that of the drive shaft.

Abstract: A communication connecting device includes a data storage to which data read by a scanner are written. A packetizer packetizes the data read out of the data storage in accordance with a packet size fed from a size information storage. A rate controller counts a period of time after the start of packet transmission or a period of time consumed to send a preselected number of packets. The rate controller calculates a communication rate on the basis of the above period of time and the number of packets sent, and then compares the communication rate with a communication rate assigned to a receiving terminal and defined by a Recommendation T.30 protocol. The rate controller allows the packets to be sent only if the calculated communication rate is lower than the communication rate of the receiving terminal.

Abstract: A swash type compressor includes sleeves which are fixedly fitted in cylinder bores. The lengths of the sleeves in an axial direction are greater than the lengths of the cylinder bores in the axial direction. A sleeve end of each of the sleeves is flush with an end surface of a cylinder block defining the cylinder bores. The opposite sleeve end of the sleeve extends beyond the cylinder bore and away from the opposite end surface of the cylinder block.

Abstract: A swash plate compressor comprises a swash plate rotated by a drive shaft and a piston that reciprocates in a cylinder bore by the rotation of the swash plate. The piston includes a tail and a pair of shoes retained in the tail. The shoes sandwich an outer periphery of the swash plate. Each shoe has a receiving face for receiving the outer periphery of the swash plate. A central point of the receiving face is located off a common plane including an axis of the piston and that of the drive shaft.

Abstract: A compressor includes a housing for accommodating a compression mechanism, and an oil separator including a cylindrical body having inner and outer cylinders defining therebetween an annular oil separating chamber and fixed in a communication passage of the housing. The outer cylinder is spaced from a communication passage-forming portion of the housing to define a gap therebetween, extends along a slit formed in the communication passage-forming portion of the housing, and is formed with an opening directed tangential to the oil separating chamber and facing part of the slit. Gas discharged from the compression mechanism flows through the slit and the opening into the oil separating chamber to form a swirl flow, so that lubricating oil is centrifugally separated from the gas. Part of the gas collies with an outer face of the outer cylinder, whereby lubricating oil is separated from the gas.

Abstract: In a compressor having a cylinder head defining a refrigerant suction chamber and a refrigerant discharge chamber, the cylinder head is provided with a space located between the refrigerant suction chamber and the refrigerant discharge chamber. The cylinder head is disposed at one end of a compressor housing so that each of the refrigerant suction chamber and the refrigerant discharge chamber communicates with a plurality of cylinder bores disposed within the compressor housing and spaced from one another in a circumferential direction. In each cylinder bore, a piston reciprocally movable is disposed.

Abstract: In a scroll compressor in which a movable scroll is placed between a housing and a fixed scroll to define a compression chamber in cooperation with the fixed scroll, an Oldham ring slidably interposed between the housing and the movable scroll to regulate a motion of the movable scroll. The Oldham ring has a space forming a back pressure chamber between the housing and the movable scroll. The movable scroll has a through hole allowing the compression chamber to communicate with the back pressure chamber.

Abstract: A swash plate-type compressor includes a cylinder block having a plurality of cylinder bores formed therethrough, a drive shaft rotatably supported by the cylinder block, and a swash plate rotatably mounted on the drive shaft. The compressor also includes a plurality of pistons, each of which is positioned within one of the cylinder bores and reciprocates within the cylinder bore. Each of the pistons includes a substantially semispherical cavity formed at an end of the piston. The compressor further includes a pair of shoes positioned between each of the pistons and the swash plate. Each shoe includes a substantially flat surface adapted to be in slidable contact with the swash plate, and a substantially semispherical portion adapted to rotatably engage the semispherical cavity of the piston. Moreover, the semispherical portion of the shoe includes a saddle portion or a groove having a first curved portion and a non-circular perimeter.